Syringe.



51 SEPT. .4 1906,

PATENT W. 'M. DEAN. SYRINGE.

APPLICATION FILED OOT.14, 1905.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed October 14, 1905. Serial No. 282,774.

To It whom it may concern.-

Be it known that I, WALTER M. DEAN, a

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Syringes, of which the fol-- lowing is a specification.

My invention relates to syringes; and the objects of the invention are, first, to provide a syringe which will produce an annular uniform spreading sheet of water; second, to provide means for regulating the rate of flow; third, to provide a syringe wherein the part-s are of simple construction and may be readily taken apart for cleansing.

I attain my objects by the mechanism.

illustrated in the accompanying drawings, in which 7 Figure 1 is a perspective view of the complete device. Big. 2 is an annular section taken through the center of the tube. Fig. 3 is a cross-section taken on a line 3 3, Fig. 2.

Similar letters refer to similar parts throughout the everal views.

The bulb a is signed to hold liquid and consists, preferably, of rubber. The tube which is joined thereto consists of two parts Z) and c, which are interiorly screw-threaded at their adjacent extremities and adapted to screw onto, the diaphragm (Z, to be thereby held together. Said diaphragm has a central a erture d, which extends longitudinally of t e tube parts and has its central axis coincident with the axes thereof. A series of apertures (Z are arranged between the aperture d and the periphery of the diaphragm.- These are intended for the passage of liquid and extend longitudinally of the tube, so that in passing through the diaphragm the liquid has no corners to turn, but passes straight through without changing its direction of motion. The s )reader 6 has an inner portion 6, which is t readed for screwing to the diaphragm d, is of reduced diameter and forms a-spreader-stem. Between said stem and the threaded extremity e a shoulder is formed, which is adapted to bear against the upper surface of the diaphragm. By reason of the smaller cross-section of the stem of the spreader an annular space e is formed between said stem 0 and the inner surface of the tip 0, through which the liquid may flow from the apertures d When viewed from the side, as in Fig. 2, the ed es of the spreader appear to be curved, the i ea being to gradually deflect the liquid from the passages (Z outward, so that as the liquid emerges it will do so in an annulansheet or spray directed at an angle to the axes of the tube portions 1) and 0. By preference the curve is approximately a parabola. It will be seen that by this construction the li uid passing through the end of the syringe oes not have to change its direction of motion, but passes straight throiwh the passages d and thence is gradually deflected outward, finally escaping from the mouth of the tip a. It will also be seen that by screwing the spreader in the diaphragm d the size of the opening at the mouth of the tube may be varied. Attention is also directed to the fact that the parts areof simple configuration and when disassembled may be easily cleaned.

What I claim as new, and desire to secure by Letters Patent, is

In a syringe, the combination of a diaphragm, a spreader screwing thereinto for being adjustably-supported thereon, and a two-part tube, the outer part whereof is cylindrical and constitutes a tip open at the end and terminating at a point near the outer end of the spreader, said tube parts both screwing onto said diaphragm whereby said diaphragm serves to join the two tube parts together and the width of the annular opening may be varied byscrewing either the tip or the spreader relatively to. the diaphragm.

In witness whereof I have hereunto subscribed my name in the presence of two witnesses.

. IVALTER M. DEAN.

Witnesses:

DWIGHT B. CHEEVER,

HOWARD M. Cox. 

